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KR-102961654-B1 - Golf club head and method of manufacturing the same

KR102961654B1KR 102961654 B1KR102961654 B1KR 102961654B1KR-102961654-B1

Abstract

The present invention relates to a golf club head with a hollow body having a hybrid spring system embedded therein, which optimizes the rebound characteristics of the club head by organically combining two types of springs with different characteristics and diversifies the feel of the ball impact through various combination structures, and a method for manufacturing the same.

Inventors

  • 최종숙
  • 엄재용

Dates

Publication Date
20260507
Application Date
20251017
Priority Date
20250502

Claims (10)

  1. In golf club heads, A club head (10) forming a hollow structure with an empty interior; A hybrid spring system (20) installed inside the hollow of the club head to add elastic force to the swing spot; is included. The above club head (10) comprises a head body (11) having a shaft connection portion integrally formed and a spring receiving groove (111, 112) formed therein, in which a hybrid spring system that adds elastic force is installed; It is composed of a head face (12) installed on the front of the head body and elastically supported by the hybrid spring system, and The above hybrid spring system (20) is composed of a first spring (21) and a second spring (22) having different elasticities and concentricity, and A golf club head characterized by having a spring receiving groove formed in the head body, into which the first and second springs are fitted and fixed.
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  4. In paragraph 1, A golf club head characterized in that the head body (11) further comprises a balancing means (30), wherein the balancing means (30) forms one or more screw holes (31h, 32h) in the toe portion and the heel portion of the head body, respectively, and comprises a plurality of weight screws (31, 32) having different masses that can be selectively coupled to the screw holes.
  5. In paragraph 4, The first spring (21) constituting the above hybrid spring system (20) is installed coaxially inside the second spring (22), and A golf club head characterized in that at least one of the first spring (21) or the second spring (22) is a shape memory alloy (SMA) spring whose mechanical stiffness changes according to ambient temperature.
  6. In paragraph 4, A golf club head characterized in that the first spring (21) and the second spring (22) constituting the hybrid spring system (20) are sequentially arranged on the same line and connected in series.
  7. In the method for manufacturing a golf club head according to any one of paragraphs 1 and 4 through 6, (a) A step of forging or casting the head body and head face of the club head; (b) a step of forming a spring receiving groove inside the head body; (c) a step of placing a hybrid spring system including a first spring and a second spring in the spring receiving groove; and (d) A method for manufacturing a golf club head characterized by including an assembly step of welding the head face and the head body to complete a hollow structure.
  8. In Paragraph 7, A method for manufacturing a golf club head characterized in that the above-mentioned spring receiving groove is integrally formed when casting the head body through an investment casting method.
  9. In Paragraph 7, A method for manufacturing a golf club head, characterized in that the spring receiving groove is formed by cutting the inner surface of the head body using CNC (Computer Numerical Control) milling.
  10. In Paragraph 7, A method for manufacturing a golf club head characterized in that the above-mentioned spring receiving groove is formed through Electrical Discharge Machining (EDM).

Description

Golf club head and method of manufacturing the same The present invention relates to a golf club head, and more specifically, to a golf club head equipped with a hollow body hybrid spring system that incorporates a hybrid spring system capable of optimizing the rebound characteristics of the club head by organically combining two types of springs having different characteristics and diversifying the feel of impact through various combination structures, and a method for manufacturing the same. In particular, the present invention relates to a golf club head capable of fine performance tuning to meet user requirements by implementing complex rebound characteristics through the inclusion of a general compression spring and a shape memory alloy (SMA) spring whose stiffness changes with temperature within a hollow structure, and a method for manufacturing the same. Golf is a game played on a course equipped with multiple holes in which a stationary ball is hit into a hole using a golf club, and depending on the performance of the golf club, the distance and direction of the ball can vary. Golf clubs have continuously evolved with the goal of increasing distance and improving accuracy. In particular, irons often require precise shots, leading to various technological attempts to enhance their performance. Traditional iron heads have primarily been made of stainless steel or titanium alloys to provide both durability and lightness, and recently, various alloys and coating technologies are being applied to further maximize the characteristics of these materials. In addition, technologies are being developed to improve the hitting performance of golf clubs by adjusting the center of gravity of the club head or absorbing vibrations generated during the swing. Examples of technologies related to golf club heads include Patent Documents 1 to 3. Patent Document 1 is an iron-type golf club head comprising: a ring-shaped main face portion protruding from the edge at the rear of the head; a central portion formed in a cavity (C) inside the main face portion that is thinner than the main face portion, wherein the central portion has a small head from the main face portion to which a badge is attached; and an auxiliary thin portion having a thickness smaller than the main face portion, wherein the main portion is thicker than the main face portion, has a main surface formed around the main face portion and faces the outer surface of the badge to position the badge, and extends between the thin portion and the face periphery portion through a cut portion of the outer thick portion. Accordingly, springs of different materials are organically combined to create synergy and diversify the method of combination. This patent document 2 is a golf club head comprising: an upper rail; a sole on the side opposite the upper rail; a toe end; a heel end on the side opposite the toe end; a rear portion connected to the sole and extending toward the upper rail; a face element comprising a striking surface and a rear wall on the side opposite the striking surface; a face reinforcing structure formed integrally with the face element; and a flex structure formed integrally with the face reinforcing structure and the rear portion; wherein the face element defines the face center, and the flex structure comprises a first end formed integrally with the face reinforcing structure, a second end formed integrally with the rear portion, and an S-shaped form between the first and second ends. Patent Document 3 describes an iron-type golf club head comprising a head body having a top, a sole, and a toe surface extending between them, and a face plate attached to the head body and having a front surface for striking a ball, wherein the face plate is partitioned by an outer circumference consisting of an upper edge extending from the top side, a lower edge extending along the sole, a toe-side edge extending along the toe surface, and a heel-side edge opposite to the toe-side edge, wherein the face plate comprises an annular outer edge portion fixed to the head body and a non-contact portion surrounded by the annular outer edge portion and not in contact with the head body, wherein the non-contact portion comprises a first thin portion having a thickness smaller than the thickness of the annular outer edge portion and a second thin portion having a thickness smaller than the thickness of the first thin portion, wherein the first thin portion is formed on the periphery of the non-contact portion so as to extend along at least the upper edge, the toe-side edge, and the lower edge of the outer circumference of the face plate, and the area of the first thin portion is 10% to 35% of the area of the non-contact portion, and the second thin portion It is an iron-type golf club head formed on the inner side of a first thin portion, the area of a second thin portion being 65% to 90% of the area of a non-contact portion, the first thin portion including a sole-sid